// node 后端服务器
const api = require('./api')
const http = require('http');
const bodyParser = require('body-parser')
const express = require('express')

const app = express()
let server = http.createServer(app);

//采用设置所有均可访问的方法解决跨域问题
app.all("*", function (req, res, next) {
    //设置允许跨域的域名，*代表允许任意域名跨域
    res.header("Access-Control-Allow-Origin", "*");
    //允许的header类型
    res.header("Access-Control-Allow-Headers", "content-type");
    //跨域允许的请求方式
    res.header("Access-Control-Allow-Methods", "DELETE,PUT,POST,GET,OPTIONS");
    if (req.method.toLowerCase() == 'options')
        res.send(200); //让options尝试请求快速结束
    else
        next();
})

app.use(bodyParser.json()) // 以json格式返回出去
app.use(bodyParser.urlencoded({
    extended: false
}))

app.use('/api', api)
// 监听端口
server.listen(3000, () => {
    console.log('express server runing at http://127.0.0.1')
})